%TV text
{\Large Television}
{
\definecolor{HumanAudioColor}{rgb}{0.2,0.2,0.6}
\begin{itemize}

\item Television is transmitted in the VHF and UHF ranges (30MHz - 3GHz).
%\item Each station is transmitted in its own band.
\item TV channels transmitted over the air are shown as \psframebox[fillstyle=solid,framearc=0.25,fillcolor=red]{\textcolor{white}{TV}}.
\item TV channels transmitted through cable (CATV) are shown as \psframebox[fillstyle=solid,framearc=0.25,fillcolor=blue]{\textcolor{white}{TV}}. CATV channels starting with ``T-" are channels fed back to the cable TV station (like news feeds).
\item Air and cable TV stations are broadcast with the separate video, colour, and audio frequency carriers grouped together in a channel band as follows:\vspace{.31in}\\
	\psframebox[linestyle=none]{\psset{xunit=1.7in}
		\psline{|<->|}(0,.28)(2.5,.28)\uput{1pt}[90](1.25,.28){6MHz}
		\white
		\psframe[linestyle=solid,framearc=0.25,fillcolor=red,fillstyle=solid](0,0)(2.5,.25)
		\psdots[linecolor=white,dotstyle=triangle*](0.625,0.02)(1.915,0.02)(2.375,0.02)
		\psline[linecolor=white](0.625,0)(0.625,.25)
		\psline[linecolor=white](1.915,0)(1.915,.15)
		\psline[linecolor=white](2.375,0)(2.375,.25)
		\psline[linecolor=white]{<->}(0,.125)(.625,.125)\rput(.29,.125){
			\psframebox[linearc=1pt,linestyle=none,framesep=0pt,fillcolor=white,fillstyle=solid]{\textcolor{Black}{1.25MHz}}}
		\psline[linecolor=white]{<->}(.625,.07)(1.915,.07)\rput(1.27,.07){
			\psframebox[linearc=1pt,linestyle=none,framesep=0pt,fillcolor=white,fillstyle=solid]{\textcolor{Black}{3.58MHz}}}
		\psline[linecolor=white]{<->}(.625,.18)(2.375,.18)\rput(1.50,.18){
			\psframebox[linearc=1pt,linestyle=none,framesep=0pt,fillcolor=white,fillstyle=solid]{\textcolor{Black}{4.5MHz}}}
		\uput{1pt}[270](.625,0){Video}
		\uput{1pt}[270](1.915,0){Colour}
		\uput{1pt}[270](2.375,0){Audio}
		}\vspace{0.1in}
\item Satellite channels broadcast in the C-Band are depicted as \psframebox[fillstyle=solid,framearc=.25,fillcolor=green]{TV}. These stations are broadcast in alternating polarities (Ex. Ch 1 is vertical and 2 is horizontal and vice versa on neighbouring satellites).

%TV horizontal refresh
\item The 15.7 kHz horizontal sweep signal produced by a TV can be heard by some young people. This common contaminant signal to VLF spectra listening is depicted as \hspace{.05in}
  \psframebox[framearc=0,linearc=0]{
	\psframe[cornersize=relative,linecolor=white, linestyle=solid, linewidth=0.8pt,fillstyle=solid,framearc=.25,fillcolor=red,linearc=0.25](-.1,-.1)(.1,.1)
	\psline[linecolor=white,linestyle=solid,linewidth=1pt]{<->}(-.1,0)(.1,0)
  }\hspace{0.07in}.

\end{itemize}

}



